Rerformance Evaluation of ER Suspensions Under Field Test

실차 시험을 통한 ER 현가장치의 성능평가

  • Published : 2000.02.01


This paper presents performance characteristics of a semi-active suspension featuring continuously variable ER (electro-rheological) dampers. These are evaluated through the field test of a passeng er car. Four ER dampers (two for front and two for rear part) are manufactured and their field-dependent damping properties are experimentally investigated. The damping force responses to step input fields are also identified by employing small size of high voltage amplifiers which are made adaptable to the field test. A skyhook controller considering the vertical, pitch and roll motions is formulated and incorporated with a car to be tested. The field test is then undertaken in order to evaluate both comfortability and steering stability showing bump, dive and squat responses.


Electro-Rheological Fluid;ER Suspension;Semi-Active Suspension;Skyhook Control;Field Test


  1. D. Karnopp, M. J. Corsby and R. A. Harwood, 1974, 'Vibration Control Using Semi-Active Force Generator,' ASME Journal of Engineering for Industry, Vol. 96, No. 2, pp. 619-626
  2. N. K. Petek, 1992, 'An Electronically Controlled Shock Absorber as an Application of Electrorheological Fluid,' SAE Technical Paper Series No-920275
  3. F. Gordaninejad, A. Ray, and H. Wang, 1997, 'Control of Forced Vibration Using Multi-Electrode Electro-Rheological Fluid Dampers,' ASME Journal of Vibration and Acoustics, Vol. 119, pp. 527-531
  4. K. H. Hangele, K. Engesdorf, M. Mettner, M. Panther, Q. N. Tran and E. Rubel, 1990, 'Continuously Adjustable Shock Absorbers for Rapid-Acting Ride Coontrol Systems(RCS),' SAE Technical Paper Series No.905125
  5. M. Nakano, 1995, 'A Novel Semi-Active Control of Automotive Suspension Using an Electrorheological Shock Absorber,' Proceeding of the 5th International Conference on ER Fluid, MR Suspension and Associated Technology, Sheffield, United Kingdom, pp. 645-653
  6. N. K. Petek, D. J. Romstadt, M. B. Liaell and Weyenberg, 1995, 'Demonstration of an Automotive Semu-Active Suspension Using elecrto-rheological Fluid,' SAE Technical Paper, Series, No.952586
  7. 정원식, 최승복, 정재천, 김철수, 이윤희, 한승직, 1996, 'ERF의 항복응력에 따른 댐퍼 성능고찰,' 한국자동차공학회 춘계학술회의 논문집, pp. 294-299
  8. 안창섭, 최영태, 최승복, 1998, 'HILS를 통한 ER 현가장치의 성능평가,' 대한기계학회 논문집(A), 제22권, 제11호, pp. 2061-2071
  9. J. Y. Wong, 1993, Theory of Ground Vehicles, Jhon Wiley & Sons, inc
  10. 이경수, 1996, '자동차 현가 시스템의 능동제어,' 대한기계학회지, 제36권 제7호, pp. 679-704